The concept of a telescope:
A telescope applies the concept of light refraction. It uses a magnifying lens to observe a distant object. The convex lens is facing the object and the concave lens (a magnifying glass) is the eye piece.
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The concept of Newton's Third law:
When one body exerts a force on a second body, the second body simultaneously exerts a force equal in magnitude and opposite in direction…
The concept of magnetic levitation
Magnetic levitation makes use of its repulsive force between like poles of two magnets.
The formation of whirlwind
When the local temperature is high, air near the ground expands and rises (low air density) to a higher level where the temperature is low (high…
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